Temperature sensor and method for detecting trip temperature of a temperature sensor
US7106127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2003 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Jul 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K3/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A comparator circuit of a temperature sensor includes an output node and a variable current node. The output node is a first voltage at a given temperature when a current at the variable current node is less than a threshold current, and a different second voltage at the given temperature when the current at the variable current node is more than the threshold current. A variable resistance circuit includes at least n resistors of different resistive values connected in series between the variable current node of the comparator and a supply voltage, where n is an integer of 4 or more. A switching circuit is provided to selectively bypasses individual ones of the n resistors during a test sequence to determine a trip temperature of the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.